Primary vascular neoplasms of lymph nodes are rare, and appear not to have previously been reported in domestic animals. This report describes hemangiomas and a lymphangioma in lymph nodes of aged Beagle dogs. Eight hemangiomas (4.8%) and one lymphangioma were present in 165 examined popliteal lymph nodes, and one hemangioma occurred in a hepatic lymph node. The hemangiomas were cavernous and benign.

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Carcinosarcoma of the breast is a rare malignancy composed of two cell lines described as a ductaltype carcinoma with a sarcoma-like component. It is an aggressive neoplasm that is usually larger in size than epithelial breast cancers and characterized by a rapid increase in size. A 32-year-old woman presented with a palpable lump in the left upper outer breast. Imaging findings and an ultrasound-guided biopsy demonstrated a malignant neoplasm with chondroid differentiation. Interventions and Outcomes: The patient underwent a modified radical left breast mastectomy with sentinel node biopsy. Pathology report from the mastectomy demonstrated an infiltrating metaplastic carcinoma (MPC) with positive lymph nodes. Discussion: The most unusual feature of this case is the lymph node positivity, as lymphatic spread is uncommonly associated with carcinosarcoma or any subtype of metaplastic carcinoma of the breast. This case is important because it illustrates the potential future need for treatment guidelines for this uncommon tumor.

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